Pressure spraying apparatus and method

ABSTRACT

A pressure spraying apparatus for selectively spraying a cleansing solution, clear rinse water, or a mixture thereof, has a closed fluid-holding tank with a normally closed loading opening. A fluid supply is connected to the tank for replacing fluid as cleansing solution is withdrawn. The incoming fluid is being directed toward a quantity of undissolved detergent in the tank to agitate and dissolve additional detergent to maintain an effective cleansing solution in the tank. A pump and spray device provide a pressure discharge of fluid. The tank supply and discharge line include a bypass and valves for controlling same and pump connections for selectively discharging cleansing solutions or water or mixtures thereof. The tank has a shell extension housing operating equipment, valves and lines mounted for withdrawal for maintenance operations.

United States Patent William L. Linville RR. 1, Box 8, Colby, Kans. 67701 (21] Appl. No. 849,053

[22] Filed Aug. 11,1969

[45] Patented June 29, 1971 [72] Inventor [54] PRESSURE SPRAYING APPARATUS AND [5 6] References Cited UNlTED STATES PATENTS 2,006,085 6/1935 Lehmkuhl 134/93 2,015,566 9/1935 Lowry 134/93 2,233,965 3/1941 Strovink.... 137/165 2,326,021 8/1943 Ericsson.... 137/5991 X 2,462,034 2/1949 Zeck 239/142 X Primary ExaminerLloyd L. King Assistant Examiner- Edwin D. Grant Attorney-Fishburn, Gold and Litman ABSTRACT: A pressure spraying apparatus for selectively spraying a cleansing solution, clear rinse water, or a mixture thereof, has a closed fluid-holding tank with a normally closed loading opening A fluid supply is connected to the tank for replacing fluid as cleansing solution is withdrawn. The incoming fluid is being directed toward a quantity of undissolved detergent in the tank to agitate and dissolve additional detergent to maintain an effective cleansing solution in the tank. A pump and spray device provide a pressure discharge of fluid. The tank supply and discharge line include a bypass and valves for controlling same and pump connections for selectively discharging cleansing solutions or water or mixtures thereof. The tank has a shell extension housing operating equipment, valve and lines mounted for withdrawal for maintenance operations.

PATENTED JUN2 9187i SHEET 1 [IF 2 INVENTOR. William L. LinviHe ATTORNEYS PATENTEUJUNZSIBYI 3589.614

SHEET 2 BF 2 INVENTOR.

William L. Linvile ATTORNEYS PRESSURE SPQ RAYING APPARATUS AND METHOD The present ihjvention relates to apparatus for spraying cleansing solutions, clear water, or mixtures thereof, onto surfaces to be cleaned, and more particularly to pressure spraying apparatusadaptedfor substantially continuous operation.

The principal objects of the present invention are: to provide a pressure spraying apparatus adapted for substantially continuously spraying cleansing or rinsing solutions onto sur faces to be cleaned; to provide such a pressure spraying apparatus having a closed tank formed within a shell having an extension to form a protective shell; to provide such a pressure spraying apparatus having the operating parts positioned within the protectiyelshell; to provide such a pressure spraying apparatus whereinithe operating parts are mounted on a platform supported for-. movement out of the protective shell for service thereof and for movement into the protective shell during spraying operations; to provide such a pressure spraying apparatus which is mobile and adapted to be wheeled to various locations adjacent the surfaces to be cleaned; to provide such a pressure spraying apparatus having a closed fluidholding tank adapted to receive soluble cleansing material, such as soap or detergent, in an amount equal toseveral times the amount which willdissolve in one full tank of liquid and having a liquid-supply conduit connected thereto for supply of liquid in a quantity equal to cleansing solution removed to provide additional dissolving of detergent and a total effective cleansing solution equal to said several times that formed in one full tank of liquid; to provide such pressure spraying apparatus which is highly maneuverable and easy to position within confined areas; and to provide such a pressure spraying apparatus which is economical to manufacture, simple and positive in operation, durable in use, and particularly well suited for the proposed use.

Other objects-and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings, wherein are set forth by way of illustration and example certain embodiments of this inventron.

FIGv l is a side elevational view of a pressure spraying apparatus embodying features of the present invention, with portions broken away to better illustrate the component parts.

FIG. 2 is a side elevational view showing a platform supporting a pump and motor for driving same in an extended position.

FIG. 3 is a transverse sectional view through a fluid-holding tank taken on line 3-3, ofFlG. 1.

FIG. 4 is a fragmentary enlarged sectional view taken on line 44, FIG. 2, showing a guideway for supporting the platform.

FIG. is a diagrammatic view of the pump and fluid con nection and flow passages.

Referring more in detail to the drawings:

The reference numeral 1 generally designates a pressure spraying apparatus for selectively spraying a cleansing solution, rinse water, or mixtures thereof, on surfaces (not shown) to be cleaned. The cleansing solution is contained within a closed fluid-holding tank 2 having soluble detergent therein in an amount equal to several times the amount which will dissolve in one tankful offluid.

The pressure spraying apparatus 1 has an elongate horiiontally disposed shell 3 having the fluid-holding tank 2 therein. While the apparatus may be arranged stationary or moved on a mobile platform, it is preferably mobile and, in the illustrated structure, the shell 3 forms the frame and has a pair of rear axle brackets 4 adjacent a rear end 5 of the shell 3 and mounted on opposite sides thereof. An axle 6 is secured to the brackets 4 and is transversely of and below the shell 3. Rear wheels 8 are rotatably mounted on opposite ends of the axle 6 and a front swivel wheel 9 is mounted adjacent a forward end 10 of the shell 3 to cooperate with the rear wheels 8 to provide a highly maneuverable mobile means for transporting and positioning the spraying apparatus 1.

It is desirable to protect the front swivel wheel 9 during spraying operations, as by at least partially enclosing same within the shell 3, therefore, the forward end 10 of the shell 3 has a lower portion thereof removed to form a wheel well 11 for receiving a swivel wheel structure 12 having a structural member 13 positioned within the shell 3 adjacent the forward end 10 and positioned transversely to a-longitudinal axis ofthe shell 3.

The structural member 13 preferably has opposite ends suitably secured to opposite sides of the shell 3 and an upper end of a yoke 14 is rotatably mounted in the structural member 13 and aligned with the longitudinal axis of the shell 3. The swivel wheel 9 is rotatably mounted in a lower bifurcated portion of the yoke 14, and a pair of arms 15 extend forwardly from the lower bifurcated portion of the yoke 14 at the mounting of the swivel wheel 9.

An elongate rod 16 has opposite ends mounted in the free ends of the arms 15 and is positioned forwardly of the swivel wheel 9 for pivotally supporting one end of an elongate tongue or handle 17, whereby the pressure spraying apparatus 1 is portable and may be maneuvered by hand or may be moved from one location to another by pulling behind a suitable vehicle.

The closed fluid-holding tank 2 is formed within the shell 3 by a rear end wall 18, being suitably secured in the rear end 5 ofthe shell 3 as bywelding, thereby providing a fluidtight wall. A partition 19 is also suitably secured within the shell 3 intermediate the ends thereof, and preferably immediately rearwardly of the wheel well 11, thereby defining the fluid-holding tank 2 between the rear end wall 18 and the partition 19.

A loading opening 20 is provided through an upper portion of the shell 3 between the end wall 18 and the partition 19 for placing suitable soluble cleansing material, such as solid or liquid soaps or detergents, into the fluid-holding tank 2. In the illustrated structure, the loading opening 20 is a tubular fitting or boss extending upwardly from the shell 3 and having a suitable closure member 21 mounted at an upper end thereof. The closure member 21 is illustrated as an externally threaded plug received within an upper end of the tubular fitting or boss.

A suitable liquid, such as city water, is supplied to the fluidholding tank 2 by supply conduit means 22 communicating with a lower portion of the closed tank 2 and connectable to a source of liquid under pressure, such as a fire hydrant, for maintaining the closed tank 2 in a filled condition and agitating the soluble detergent therein during removal of the cleansing solution therefrom. A substantially rigid liquid supply pipe 23 is mounted within the holding tank 2 and is positioned adjacent a lower portion thereof and spaced above the interior surface of a lower portion of the shell 3. The pipe 23 extends substantially the full longitudinal length of the tank 2 and has one end supported by the partition 19 and extending therethrough. The other end of the pipe 23 is closed and there are a plurality of longitudinally spaces apertures 24 positioned in facing relation with the lower interior surface of the holding tank 2, thereby providing a plurality of jet sprays which pass through the undissolved detergents in the lower portion of the tank 2, thereby dissolving same to provide a cleansing solution at an effective concentration within the tank 2 as the cleansing solution is withdrawn, as later described. The jet sprays from the apertures 24 are directed toward and through a quantity of undissolved detergent in the tank to agitate and dissolve addi-. tional detergent to maintain an effective saturated cleansing solution therein as the cleansing solution is withdrawn.

The saturated cleansing solution is withdrawn from the tank 2 and sprayed onto a surface to be cleaned (not shown) and, in the illustrated structure, liquid discharge conduit means communicate with an upper portion of the closed tank 2 for removing the cleansing solution of detergent and water therefrom. The liquid discharge conduit 25 has an outlet pipe 26 which extends through the partition 19 and has an open end 27 positioned within an upper portion of the closed tank 2, thereby providing an entrance to the outlet pipe 26 for flow of the cleansing solution from the tank 2 to a suitable spray device 28, as later described.

The cleansing solution is delivered to the spray device 28 under a pressure greater than the pressure within the tank 2, and, in the illustrated structure, an elongate flexible tube 29 has one end connected to the outlet pipe 26 and the other end connected to a pump 30 for moving the cleansing solution from the tank 2 to the spray device 28. The pump 30 and a motor 31 for driving same are positioned within the shell 3 and a forward end wall 32 closes the shell 3 at the forward end 10, as later described.

The liquid, such as water under pressure, is supplied to the liquid supply pipe 23 by connecting a suitable source of supply, such as a fire hydrant (not shown) to a pipe 33 sup ported in the forward end wall 32 with the pipe 33 being connected to the supply pipe 23 by an elongate flexible tube 34. The pipe 33 has a suitable shutoff valve 35 mounted therein for controlling flow of the water under pressure to the supply pipe 23 within the holding tank 2.

it is desirable to control the concentration of the detergent in the cleansing solution delivered to the spray device 28, therefore, a bypass conduit 36 provides communication between the flexible discharge tube 29 and the flexible supply tube 34, and a suitable three-way valve 37 is mounted at the connection of the bypass conduit 36 to the discharge tube 29 to permit selection of rinsing solution flowing directly from the source of the fluid or fulLstrength cleansing solution, or a mixture of water and cleansing solution. The three-way valve 37 is operative to restrain cleansing solution within the tank 2 from entering the pump 30 and the three-way valve 37 is operative to allow part or all of the flow from the supply source to mix with the cleansing solution, thereby regulating the concentration of the cleansing solution delivered to the pump 30 and the spray device 28.

A throttle valve 37 is placed in the bypass conduit 36 to control the volume of liquid delivered to the three-way valve 37. When the throttle valve 37' is fully closed, no liquid enters the three way valve 37 and all the flow from the supply source is directed into the supply pipe 23 for agitating the undissolved detergent to dissolve a portion thereof and maintain the tank 2 in a filled condition. When the throttle valve 37 is fully open, all of the liquid flows directly to the pump 30 through the three-way valve 37 and bypasses the tank 2. When the throttle valve 37' is partially closed, it places an obstruction in the bypass conduit 36 so that a portion of the liquid must circulate through the tank 2 to force cleansing solution into the pump 30 through the discharge conduit 25 and a portion of the liquid flows directly to the three-way valve 37 to adjust the concentration ofthe detergent in the solution delivered to the pump 30 by mixing with the saturated cleansing solution from the tank 2.

It is desirable to protect the pump 30 and motor 31 from fluid dispensed from the spray device 28 during operation of the pressure spraying apparatus 1, and from dirt and debris, such as bugs, sand, stones, and the like, during transportation of the pressure spraying apparatus 1, therefore, the pump 30 and the drive motor 31 are positioned within the shell 3 between the forward end wall 32 and the partition 19.

Access is provided to the pump 30, motor 31, and the threeway valve 37 for service, maintenance, and repair, by mounting the pump 30 and motor 31 on a platform 38 which is removably mounted within the shell 3 at the forward end thereof. In the illustrated structure, a structural member 39 is positioned rearwardly of the structural member 13 and substantially parallel theretor A pair of horizontal elongate guideways 40 are supported on the structural members 13 and 39 and are positioned to be aligned substantially parallel with the longitudinal axis of the shell 3 for supporting opposite edges of the platform 38 for longitudinal movement therealong. The forward end wall 32 is suitably secured to the platform 38, whereby when the platform 38 is positioned within the forward end of the shell 3, the forward end wall 32 closes the forward end thereof.

When it is desired to perform major repair or maintenance on the pump 30 or motor 31, the platform 38 may be completely removed from the shell 3 by disconnecting the flexible tubes 29 and 34 from the pipes 26 and 23, respective ly.

It is desirable to change the concentration of the cleansing solution delivered to the pump 30 while the three-way valve 37 and the pump 30 are positioned within a chamber 41 defined by the shell 3, partition 19, and end wall 32, therefore, an elongate rod 42 is operatively connected to the operative parts of the three-way valve 37 and the rod 42 extends through the forward end wall 32 and has a suitable handle 43 mounted on the other or free end thereof and the handle 43 is positioned outside the chamber 41 for controlling the adjustment ofthe three-way valve 37,

The operation of the throttle valve 37' is controlled by an elongate rod 42 which is operatively connected to the operative parts of the throttle valve 37'. The rod 42 extends through the forward end wall 32 and has a suitable handle 43' mounted on the other or free end thereof and the handle 43 is positioned outside the chamber 41 for controlling the adjustment ofthe throttle valve 37.

In use, the pressure spraying apparatus 1 is positioned adjacent the surface or article to be cleaned, such as a vehicle, construction equipment, farm equipment, or the like, and the pipe 33 is connected to a suitable source of liquid under pressure, such as city water. The shutoff valve 35 is closed and the plug 21 is removed from the loading opening 20 and soluble detergent or soap is placed within the tank 2. The shutoff valve 35 is opened and the throttle valve 37' is closed to permit the tank 2 to be completely filled with the liquid. Upon completely filling the tank 2, the shutoff valve 35 is closed, and the plug 21 is placed in the loading opening 20, thereby closing the same, and the shutoff valve 35 is reopened to per mit flow ofliquid under pressure through the pipe 33, tube 34, and supply pipe 23, to maintain the tank 2 in a filled condition when cleansing solution is withdrawn therefrom by operation of the pump 30 and spray device 28. During the withdrawal of cleansing solution from the tank 2, fluid jets flow outwardly and downwardly through the apertures 24 and through the soap or detergent placed in the tank 2 and agitate same, thereby dissolving a portion of the soap or detergent in the tank 2, the portion dissolved being the amount to maintain a saturated cleansing solution within the tank 2. The liquid flows into the tank 2 through the pipe 23 to maintain the tank 2 at a pressure substantially equal to the pressure of the supply source. Upon activation of the spray device 28, as by a suita ble trigger 44 thereon, the cleansing solution flows through the outlet pipe 26 and the flexible discharge tube 29 to the pump 30 and through a flexible tube 45 connecting the spray device 28 to the pump 30. When it is desired to mix cleansing solution and clear water or rinsing solution to dilute the cleansing solution received from the tank 2, the throttle valve 37' is partially opened and the three-way valve 37 is adjusted by the handle 43 on the rod 42. When it is desired to rinse the surface being cleaned, the throttle valve 37' is fully opened and the three-way valve 37 is again adjusted to permit flow directly from the liquid source to the spray device 23 through the flexible tube 34 and the bypass conduit 36 to the pump 30. It is noted that the pressure spraying apparatus 1 is particularly adapted for substantially continuous operation in that the pressure spraying apparatus 1 is particularly adapted for substantially continuous operation in that the amount of soap or detergent placed within the tank 2 may be several times the amount of detergent which will be dissolved and placed in solution with one volume of the tank 2, and as saturated cleansing solution is removed from the tank 2 and additional fluid is supplied to the tank 2 through the apertures 24, additional detergent will be dissolved, thereby maintaining the saturated cleansing solution within the closed tank 2. When it is desired to service the pump 30 or motor 31, or to check the condition of the various tubes within the chamber 41, or to service the throttle valve 37' or the three-way valve 37, the

platform 38 may be partially or completely removed from the chamber 41. Hooks or straps 46 are mounted on opposite ends of the shell 3 to provide means for lifting the spraying apparatus l to place same on a suitable truck or the like for transporting the spraying apparatus 1 over long distance.

It is to be understood that, while I have illustrated and described one form of my invention, it is not to be limited to the specific form or arrangement of parts herein described and shown.

What I claim and desire to secure by Letters Patent is:

l. A pressure spraying apparatus comprising:

a. a closed tank having a loading opening in an upper surface thereof for introducing soluble detergent into said tank,

b. said tank being horizontally disposed and having a shell extending between and secured to end walls at opposite ends thereof,

c. said tank shell extending beyond one of said end walls thereby defining a chamber having said pump means therein,

d. a closure member for closing said loading opening,

e. liquid supply conduit means communicating with a lower portion of said closed tank and connectable to a source of liquid under pressure for maintaining said closed tank in a filled condition, said supply conduit means directing the liquid toward the soluble detergent in the tank for agitating same to facilitate the solution thereof to form a cleansing solution,

f. said supply conduit means having an elongate pipe portion positioned within and adjacent a lower surface of said tank,

g. said pipe portion having a plurality of longitudinally spaced apertures facing said tank lower surface and a closed end whereby liquid under pressure is directed toward said tank lower surface thereby passing through and agitating the detergent for dissolving a portion of the detergent,

h. liquid discharge means having an inlet in communication with said closed tank above the soluble detergent for removing cleansing solution of detergent and liquid therefrom,

i. said liquid discharge means including discharge conduit means having a pipe portion with an entrance positioned above the soluble detergent in said tank and pump means operatively connected to said pipe portion for drawing the cleansing solution therethrough,

j. flow conduit means connecting said liquid supply conduit means and said discharge conduit means for mixing cleansing solution and liquid from the liquid source,

k, spray means connected to said liquid discharge means for spraying the cleansing solution,

1. valve means in said flow conduit means for controlling the quantity of liquid mixed with the cleansing solution removed from said closed tank for controlling the concentration of detergent in the cleansing solution delivered to said spray means,

m. said liquid supply conduit means and said liquid discharge conduit means each having a flexible tube portion within the chamber and connected to the respective pipe portions,

n. elongate guideways within said chamber,

0. a platfonn received within said guideways for longitudinal movement therealong, said pump means being mounted thereon,

p. a wall member mounted on one end of said platform for closing said chamber when said platform is positioned within said chamber.

2. A pressure spraying apparatus comprising:

a. an elongate horizontally disposed shell having a portion closed for holding liquid, said closed portion having a loading opening in an upper portion thereof for placing a soluble detergent therein,

b. a removable closure member for closing said loading opening,

0. mobile means mounted on said shell for transporting same,

d. a power-driven pump mounted within said shell and positioned outside said closed portion,

. water supply conduit means communicating with a lower portion of said closed portion of said shell and connectable to a source of water under pressure for maintaining said closed portion of said shell in a filled condition, said supply conduit means directing the water toward the soluble detergent in the closed portion for agitating the soluble detergent within said closed portion to facilitate the solution thereof to form a cleansing solution,

f. liquid discharge conduit means having an inlet in communication with said closed portion of said shell at a point above the soluble detergent, said liquid discharge conduit means being connected to said pump for removing cleansing solution of detergent and water from said closed portion,

g. spray means connected to said pump for spraying the cleansing solution,

h. said water supply conduit means has an elongate pipe portion positioned within said closed portion of said shell and an elongate flexible tube portion connected to said supply pipe portion, said flexible tube portion being within said shell outside said closed portion,

i. said liquid discharge conduit means has an elongate pipe portion positioned within said closed portion of said shell and an elongate flexible tube portion connected to said discharge pipe portion, said flexible tube portion being within said shell outside said closed portion,

j. a pair of horizontal elongate guideways within said shell,

k. a platform having opposite side edges received within said guideways for longitudinal movement therealong, said platform having said power-driven pump mounted thereon whereby said pump may be withdrawn from said shell, and

l. a wall member mounted on one end of said platform for closing said shell when said platform is positioned therein.

3. The pressure spraying apparatus as set forth in claim 2 wherein:

a. said pipe portion of said water supply conduit means has one end thereof closed and is positioned adjacent and above a lower surface of said closed portion of said shell; and

b. said water supply pipe portion has a plurality of longitudinally spaced apertures in facing relation with the lower surface of the closed portion of said shell whereby jet sprays agitate detergent in excess of that dissolved when said closed portion is filled with water under pressure and said detergent will be dissolved during operation of the pressure spraying apparatus.

4. The pressure spraying apparatus as set forth in claim 3 including:

a. a bypass conduit connecting said flexible tube portions of said water supply conduit means and said liquid discharge conduit means;

b. a three-way valve in said bypass conduit for controlling porportions of cleansing solution and water delivered to said spray means; and

c. adjustment means exteriorly of said shell and operatively connected to said three-way valve for controlling flow therethrough.

5. A pressure spraying apparatus comprising.

a. an elongate horizontally disposed shell having a portion closed for holding liquid, said closed portion having a loading opening in an upper portion thereof for placing a soluble detergent therein,

b. a removable closure member for closing said loading opening,

mobile means mounted on said shell for transporting same,

d. a power-driven pump mounted within said shell and positioned outside said closed portion,

e. water supply conduit means communicating with a lower portion of said closed portion of said shell and connecta- 7 8 ble to a source of water under pressure for maintaining cleansing solution, said closed portion of said shell in a filled condition, h. a pair of horizontal elongate guideways within said shell, f. liquid discharge Con it mea h ing an inlet n COmmU- i. a platform having opposite side edges received within said nication with said closed portion of said shell at a point guideways f longitudinal movement therealongi said above the soluble detergent, said liquid discharge conduit means being connected to said pump for removing cleansing solution of detergent and water from said closed portion,

g. spray means connected to said pump for spraying the platform having said power-driven pump mounted thereon whereby said pump may be withdrawn from said shell. 

2. A pressure spraying apparatus comprising: a. an elongate horizontally disposed shell having a portion closed for holding liquid, said closed portion having a loading opening in an upper portion thereof for placing a soluble detergent therein, b. a removable closure member for closing said loading opening, c. mobile means mounted on said shell for transporting same, d. a power-driven pump mounted within said shell and positioned outside said closed portion, e. water supply conduit means communicating with a lower portion of said closed portion of said shell and connectable to a source of water under pressure for maintaining said closed portion of said shell in a filled condition, said supply conduit means directing the water toward the soluble detergent in the closed portion for agitating the soluble detergent within said closed portion to facilitate the solution thereof to form a cleansing solution, f. liquid discharge conduit means having an inlet in communication with said closed portion of said shell at a point above the soluble detergent, said liquid discharge conduit means being connected to said pump for removing cleansing solution of detergent and water from said closed portion, g. spray means connected to said pump for spraying the cleansing solution, h. said water supply conduit means has an elongate pipe portion positioned within said closed portion of said shell and an elongate flexible tube portion connected to said supply pipe portion, said flexible tube portion being within said shell outside said closed portion, i. said liquid discharge conduit means has an elongate pipe portion positioned within said closed portion of said shell and an elongate flexible tube portion connected to said discharge pipe portion, said flexible tube portion being within said shell outside said closed portion, j. a pair of horizontal elongate guideways within said shell, k. a platform having opposite side edges received within said guideways for longitudinal movement therealong, said platform having said power-driven pump mounted thereon whereby said pump may be withdrawn from said shell, and l. a wall member mounted on one end of said platform for closing said shell when said platform is positioned therein.
 3. The pressuRe spraying apparatus as set forth in claim 2 wherein: a. said pipe portion of said water supply conduit means has one end thereof closed and is positioned adjacent and above a lower surface of said closed portion of said shell; and b. said water supply pipe portion has a plurality of longitudinally spaced apertures in facing relation with the lower surface of the closed portion of said shell whereby jet sprays agitate detergent in excess of that dissolved when said closed portion is filled with water under pressure and said detergent will be dissolved during operation of the pressure spraying apparatus.
 4. The pressure spraying apparatus as set forth in claim 3 including: a. a bypass conduit connecting said flexible tube portions of said water supply conduit means and said liquid discharge conduit means; b. a three-way valve in said bypass conduit for controlling porportions of cleansing solution and water delivered to said spray means; and c. adjustment means exteriorly of said shell and operatively connected to said three-way valve for controlling flow therethrough.
 5. A pressure spraying apparatus comprising: a. an elongate horizontally disposed shell having a portion closed for holding liquid, said closed portion having a loading opening in an upper portion thereof for placing a soluble detergent therein, b. a removable closure member for closing said loading opening, c. mobile means mounted on said shell for transporting same, d. a power-driven pump mounted within said shell and positioned outside said closed portion, e. water supply conduit means communicating with a lower portion of said closed portion of said shell and connectable to a source of water under pressure for maintaining said closed portion of said shell in a filled condition, f. liquid discharge conduit means having an inlet in communication with said closed portion of said shell at a point above the soluble detergent, said liquid discharge conduit means being connected to said pump for removing cleansing solution of detergent and water from said closed portion, g. spray means connected to said pump for spraying the cleansing solution, h. a pair of horizontal elongate guideways within said shell, i. a platform having opposite side edges received within said guideways for longitudinal movement therealong, said platform having said power-driven pump mounted thereon whereby said pump may be withdrawn from said shell. 